Earlier quoted context omitted.
Treating food with chemicals usually it's not good. Also you simply don't know what exactly are they doing. Like ultra processed american bread is not so good comparing with european wholegrain sourdough bread.
Processing by itself is not a bad thing. Everything is "chemicals" in some sense and what you mean in particular is not bad in general. European bread as of today is highly processed btw.. it's pretty rare to find a bakery that actually bakes starting with the ingredients. Most just bake pre-processed and pre-made stuff coming from a huge factory. Typical European/German bread is not terribly healthy to begin with.
For example, common ingredients like potassium bromate or ADA are straight up banned in the EU for health concerns.
Reading the ingredient list of American bread is plain shocking at times.